RICE STEAMER: Empty the peppers and the mushrooms including water into steamer bowl. Mix in cumin, then mix in rice. Add boiling water from kettle as / if needed to top up rice by 3 cm (1 inch). Cover, and let steam for about 45 minutes. (OR follow directions for your own rice steamer.)
STOVE TOP POT: Empty the peppers and the mushrooms including water into pot. Mix in cumin. Bring to a boil, then stir in rice. Add boiling water from kettle as / if needed to top up rice by 3 cm (1 inch). Reduce to a low simmer, cover and cook for 15 minutes.
Notes
Any type of rice is fine, short grain or long grain, white or brown. Probably not the right kind of recipe, though, for risotto or pudding rice.